381018930 has 32 divisors (see below), whose sum is σ = 915473664. Its totient is φ = 101490816.

The previous prime is 381018929. The next prime is 381018931. The reversal of 381018930 is 39810183.

It is an interprime number because it is at equal distance from previous prime (381018929) and next prime (381018931).

It is a junction number, because it is equal to n+sod(n) for n = 381018891 and 381018900.

It is not an unprimeable number, because it can be changed into a prime (381018931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21927 + ... + 35253.

It is an arithmetic number, because the mean of its divisors is an integer number (28608552).

Almost surely, 2^381018930 is an apocalyptic number.

381018930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381018930 is an abundant number, since it is smaller than the sum of its proper divisors (534454734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381018930 is a wasteful number, since it uses less digits than its factorization.

381018930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14290.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 381018930 is about 19519.7061965594. The cubic root of 381018930 is about 724.9624586189.

The spelling of 381018930 in words is "three hundred eighty-one million, eighteen thousand, nine hundred thirty".